Fuel-supplying device



Sept. 29, 1925, 1,555,297 1" H. KREISINGE R FUEL SUPPLYING DEVICE Filed May 18'. H2: SSheets-Sheet 1 g l -9 l I 29 WIT/I856. I v i g E DINYENTOR I Q ATTORNEYS Sept. 29, 1925.

H. KREISINGER FUEL surrmma nsvrcs,

Filed Kay 18, 1923' 3 Shasta-Sheet 5 A TTORNE Y 5 INVENTOR Patented Sept. 29, 1925.

UNITED STATES PATENT OFFICE.

HENRY KREISINGER, OF PIERMONT, NEW YORK, ASSIGNOR TO COMBUSTION. ENGINEER- ING CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

FUEL-SUPPLYING DEVICE.

Application filed May 18, 1923.

T 0 all 11. hom it may concern:

Be it known that I, HENRY KmnsINGER, a citizen of the United States, residing at Piermont, in the county of Rockland and State of New York, have invented certain new and useful Improvements in Fuel-Supplying Devices, of which the following is a specification.

This invention relates to mechanism for supplying or carrying materials in a finely divided state, such, for example, as the pulverized coal supplied to apparatus for burning the same, in connection with which my invention is particularly useful.

The invention will be described as applied to pulverized coal. In this art, the pulverized coal is stored or collected in a bin or hopper from which it is fed by a feeder means to a pipe or pipes leading to the burner or burners of the furnace. Ordinarily there is a battery of feeders supplied from the same general source. There is also a shut-off device between the bin or hopper and each feeder means, but the shut-off devices heretofore used have been of such character that they have been difficult to close the shut-off communication between the bin and the feeder means, the closing involving a considerable loss of time (sometimes hours), as well as the expenditure of a good deal of power; and this obviously introduces considerable complications as, for example, when a feeder needs repair. Furthermore, bridging of the fuel in the hopper over the discharge outlet thereof frequently occurs, especially if the fuel should happen to be wet. This stops the feed which is very objectionable in the burning of pulverized coal. To overcome this diiiiculty it has been customary to strike the hopper heavy blows with a sledge hammer, which, of course, is very impractical.

It is one of the primary objects of my invention to provide a shut-01f means which can be very quickly manipulated and with little effort. Another of the objects of the invention is the provision of a combined shutoff and agitating means or, stated in another way, the provision of a shut-off means which may be utilized, when fuel is being supplied from the bin to the feeder mechanism and thence to the point of use, as an agitating or stirring means for the preventing of bridgmg.

The foregoing, together with such other Serial No. 639,797.

objects as may hereinafter appear, or are in oident to my invention, I obtain by means of a construction which I have illustrated in preferred form in the accompanying drawings, wherein:

Fig. l is an end elevation indicating the application of my improvements in the feeding of pulverized coal to a furnace;

Fig. 2 is an end elevation of Fig. 1;

Fig. 3 is an elevation, drawn on an enlarged scale, of the shut-ofi mechanism in relation to a feeder;

Fig. 4: is a plan view of Fig. 3; and

Fig. 5 is a fragmentary section showing the shut-off means in closed position.

Referring now particularly to Figs. 1 and 2, the reference letter A denotes some form of furnace for the burning of pulverized coal, such coal being supplied from the bin or hopper B through discharge outlets 7 to the battery of feeding devices 8. which in turn feed the coal to the pipes 9, leading to the burners 10 of the furnace.

The specific form of feeder mechanism forms no part of the invention and it, therefore, will suflice to point out that the feeder devices are operated from the shaft 11 through the medium of the clutches 12 and associated parts, an arrangement which makes it possible to cut off any one or more of the feeders. The shaft 11 is turned or driven by any suitable driving mechanism such as that indicated at C.

A box-like casing or throat D connects each discharge outlet 7 of the bin to a feeder. The upper part 13 of this throat is rectangular in cross section and houses the shut-off mechanism E, while the bottom portion 14 is circular in cross section.

The shut-off means E may be described as a shutter gate, comprised of a suitable number of shutters or blades 15 journaled in the rectangular portion 13 of the throat D, as will be clear on inspection of Figs. 3, 4 and 5. The close position of the shutters is shown in Fig. while in Figs. 3 and 4, the shutters are in open position. The trunnion 16 of each shutter has a crank arm 17 keyed thereto, the hub 18 of the crank being shaped so as to receive a suitable wrench. To close the gate, each shutter is turned by means of this hub and it will at once be seen that this can be done very readily and very easily as compared, for example, to a straight slide valve or gate which is very liable to stick because of the nature of the material being handled. The ends or outer edges of the shutters are ribbed as at 19 so as to interfit, as shown in Fig. 5, to secure a very tight closure.

When the gate is opened and fuel 1s beving supplied, if for any reason it is desired or found necessary, the shutters can be used as an agitating or stirring means by simply hooking the notched bar 20 over the crank pins 21 of the crank arms 17. This bar 20 may be thus used to couple all of the shutters and it will remain in place by gravlty. On inspection of Fig. 3 it will be seen that the right-hand crank arm 17 is provided yvith a second crank pin 22 which is adapted to receive the eye of a connecting or rocker rod 23, which rod is operated from the eccentric or crank 24:, more clearly shown in Fig. 1. The throw of this eccentric or crank is preferably such as to cause the shutter blades to slightly oscillate back and forth so as to agitate or stir the coal to prevent the bridging referred to. This is not always necessary, and for this reason I have made the bar 20 readily detachable and, for the same purpose, I make the connecting or rocker rod 23 readily detachable. The shaft 25 carrying the eccentric 24 may be operated in any suitable manner, as for example, by means of the worm drive 26 operated from the feeder shaft 27.

Carrying air may be supplied, as for example, through the connection 29.

What I claim is:

1. Apparatus for supplying finely divided material including a source of supply having a discharge outlet and a shutter gate for controlling the discharge and comprising a plurality of rotatably supported shutter blades, said blades having means whereby they may be independently operated and means adapted to be engaged by a common member whereby they may be simulta neously operated.

2. Apparatus for supplying finely divided material including a source of supply having a discharge outlet and a shutter gate for controlling the discharge and comprising a plurality of rotatably supported shutter blades, said blades having means whereby they may be independently operated and means adapted to be engaged by a common member whereby they may be simultaneously operated together with means for imparting oscillatory movement to one of the blades and to the balance thereof thru the medium of the common member.

3. Apparatus for supplying finely divided material including a source of supply having a plurality of discharge outlets, shutter gates for controlling discharge, each comprising a plurality of rotatably supported shutter blades, said blades having means whereby they may be independently operated, feeding devices adapted to receive and deliver discharged material and driving means for said feeding devices together with means for selecting the feeding device or devices to be operated.

4. In combination, a pulverized material bin having a gravity discharge throat, a shutter gate in the throat comprising a plurality of rotatably supported shutter blades, said blades having means whereby they may be independently operated and means adapted to be engaged by a common member whereby they may be simultaneously operated, a feeder means below the gate, and means for imparting oscillatory movement to one of the blades and to the balance thereof thru the medium of the common member said last mentioned means receiving its source of power from the feeder means.

5. Apparatus for supplying finely divided material including a source of supply having a discharge outlet and a shutter gate for controlling the discharge and comprising a plurality of rotatably supported shutter blades, said blades having means whereby they may be independently operated and means adapted to detachably receive a supplemental member whereby said blades may be simultaneously operated.

In testimony whereof, I have hereunto signed my name.

HENRY KREISINGER. 

